:root {
    --toc-width: min(16rem, 92vw);
    --toc-bg: #282828;
    --toc-fg: #e7eaf0;
    --toc-accent: #e7eaf0;
    --toc-accent-2: #99c5fc;
    --toc-gray: #3a3a3a;
    --toc-border:rgb(48, 48, 48);
}

#toc-toggle {
    position: fixed;
    top: 0;
    right: 0;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.toc-flyout {
    position: fixed;
    top: 4.5rem;
    bottom: 4.5rem;
    right: calc(-1 * var(--toc-width));
    width: var(--toc-width);
    background: var(--toc-bg);
    box-shadow: -6px 0 24px rgba(0,0,0,.35);
    transition: right .28s ease;
    z-index: 9999;
    display: flex;
    flex-direction: column;
    border-radius: 0.5rem 0 0 0.5rem;

    /* 1px solid var(--toc-border) on top,left,bottom */
    border: 1px solid var(--toc-border);
    border-right: none;
}

#toc-toggle:checked ~ .toc-flyout {
    right: 0;
}

.toc-tab {
    position: fixed;
    top: 20%;
    right: 0;
    transform: translateY(-20%);
    background: var(--toc-bg);
    border-right: none;
    padding: 1.1rem .4rem 1.1rem .4rem;
    font-size: 1.3rem;
    border-radius: .5rem 0 0 .5rem;
    cursor: pointer;
    z-index: 10000;
    display: inline-flex;
    align-items: center;
    gap: .5rem;
    user-select: none;
    transition: right .28s ease;

    /* 1px solid var(--toc-border) on top,left,bottom */
    border: 1px solid var(--toc-border);
    border-right: none;
}

#toc-toggle:checked ~ .toc-tab {
    right: calc(var(--toc-width) - 1px);
}

.toc-tab:focus {
    outline: 2px solid var(--toc-accent);
    outline-offset: 2px;
}

.toc-header {
    display: flex;
    align-items: center;
    justify-content: flex-start;
    padding: .9rem 1rem;
    border-bottom: 2px solid var(--toc-gray);
}

.toc-title {
    font-size: 0.95rem;
    letter-spacing: .02em;
    opacity: .9;
}

.toc-content {
    padding: .5rem .75rem 1rem;
    overflow: auto;
    height: 100%;
}

.toc-content ul {
    list-style: none;
    margin: 0;
    padding-left: 0.5rem;
    margin-left: 0.5rem;
}

.toc-content > ul > ul {
    padding-left: 0rem;
    margin-left: 0rem;
}

.toc-content ul ul:not(.toc-level-2) {
    border-left: 2px solid var(--toc-gray);
}

.toc-item {
    margin: 0;
    line-height: 1.6;
}

.toc-item a {
    display: inline-block;
    color: var(--toc-accent);
    text-decoration: none;
}

.toc-item a:hover {
    color: var(--toc-accent-2);
}

.toc-item-level-1 { font-weight: bold; font-size: 1.2rem; }
.toc-item-level-2 { font-size: 1.1rem; }
.toc-item-level-3 { font-size: 0.9rem; }
.toc-item-level-4 { font-size: 0.7rem; }
.toc-item-level-5 { font-size: 0.6rem; }
.toc-item-level-6 { font-size: 0.5rem; }
.toc-item-level-7 { font-size: 0.4rem; }

.toc-flyout, .toc-tab {
    -webkit-tap-highlight-color: transparent;
}